[PATCH 5.10 127/717] media: cedrus: fix reference leak in cedrus_start_streaming

Greg Kroah-Hartman
2020-12-28T14:05:11Z

From: Zhang Qilong <zhangqilong3@huawei.com>

[ Upstream commit 940727bf22f74cbdef8de327de34c4ae565c89ea ]

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in cedrus_start_streaming. We should fix it.

Fixes: d5aecd289babf ("media: cedrus: Implement runtime PM")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/media/sunxi/cedrus/cedrus_video.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
index 667b86dde1ee8..911f607d9b092 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
@@ -479,8 +479,10 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)

if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
ret = pm_runtime_get_sync(dev->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev->dev);
goto err_cleanup;
+ }

if (dev->dec_ops[ctx->current_codec]->start) {
ret = dev->dec_ops[ctx->current_codec]->start(ctx);
--
2.27.0